After downloading itunes

New computer w/vista. downloaded i tunes 8 and when i open it i get a warning. 'i tunes was improperly improperly installed. if you wish to import or burn CDs you need to reinstall i tunes.' i have done this several times and i still get the same warning. what am i doing wrong?

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Open Add or remove user accounts (If using the Classic View in Windows Vista, open User Accounts. Then open Manage another account).

Select Create a new account and follow the instructions to complete the account setup process.

Once the new account is created, choose Log Off from the Start menu.

Log into the newly created user account.

Open iTunes and determine whether the issue you were experiencing persists in this new user.

If still it doesn't work than follow the folllowing steps:

Remove iTunes Plug-insThird-party iTunes plug-ins can cause many issues, particularly if the plug-in has not been updated to be compatible with new versions of iTunes. iTunes plug-ins are stored in the following location: C:\Users\username\AppData\Roaming\Apple Computer\iTunes\iTunes Plug-ins

Remove iTunes Preference filesSome of the files that iTunes uses to store settings and preferences may be unusable and cause issues. iTunes has two folders where preferences are saved. Move one of them to the desktop and test to see if the issue persists. If it does, move it back and remove the second folder. The location for the two preference folders are:

make sure that you have all the software that you downloaded with i-Tune such as Quicktime this is needed to run i-tune to work 100% you Will have to download the piece you are missing or save you music to windows uninstall and reinstall i-Tunes.

Launch Internet Explorer
Click the Tools menu
Select Internet Options
Click the Connections tab
Click the LAN Settings button
Make sure that that "Use a proxy server for your LAN" checkbox is unchecked
Click OK till you are out of everything, and then close Internet Explorer
Try again in iTunes to load the store

if this dose not work

Then it is your security that is blocking you

try this

Sometimes this error can be caused by software on your computer that
slows down the network connection. This error can also appear if you
are downloading multiple items. I'd like to provide some steps that
should help you successfully download your purchases.

It often helps to pause the download and then download items one at a time. These steps will walk you through doing this:

1) Open iTunes.

2) From the Store menu at the top, choose Check for Available
Downloads. If you're unable to upgrade and are using iTunes 7, the
option will say Check for Purchases.

5) Click the Pause All button in the lower-right corner. This will temporarily pause all of your downloads.

6) To resume only one of the downloads, click the refresh button that appears to the right of one of the paused downloads.

Certain types of software can affect the way a computer sends and
receives information from the Internet. Here are a few examples of
these types of software:

Firewalls

Web accelerators

Ad filters

Virus protection software

If you have any of this kind of software installed on your computer,
you will need to configure each of the applications to allow your
internet connection to access iTunes freely. For instructions, please
refer to the documentation that came with that software, or contact the
software's manufacturer. You'll need to configure the software to allow
these domains to send and receive data from the Internet freely:

itunes.apple.com
ax.itunes.apple.com

For assistance in configuring your firewall or accelerator software,
you may need to contact the manufacturer or your Internet service
provider (ISP). When contacting their support representatives, it may
be useful to have the following information:

6) Enter your account name and password, then click Check. The missing
item should begin downloading and appear in your Purchased playlist.

Please note that the iTunes Store cannot investigate every user's
connection issue. Apple Discussions are another source of information
about iTunes, where everyone from new users to professionals can
interact and share their knowledge and experiences. You may find
another user with the same operating system or ISP that may be able to
help resolve this issue. You can find the iTunes discussions group at:

i had this problem , first you should remove you exitune and you i tune library and after that you should install a new i tunes
Microsoft Windows XP and 2000
\Documents and Settings\[your username]\My Documents\My Music\
Microsoft Windows Vista
\Users\[your username]\Music\this is the addres of your itunes librarry delet that and make a new one i hope it can help you